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<h2>插件解析</h2>
<h3>日志插件</h3>
<h4>功能</h4>
<p>日志插件用于记录kong网关的日志，日志先写入内存的缓冲区，然后采用缓冲大小阀值或定时任务进行异步刷出操作</p>
<p>刷出方式：</p>
<ul>
<li>写文件</li>
<li>发送kafka</li>
<li>通过socket发送到日志服务器</li>
<li>其他（自定义flush_func）</li>
</ul>
<h4>方案</h4>
<ul>
<li>缓冲阀值方案，缓冲日志超过阀值，则进行刷出，否则不刷出</li>
<li>缓冲定时方案，运行定时任务对数据进行刷出操作</li>
</ul>
<h4>配置方案</h4>
<h5>插件名称： tdwutils\log</h5>
<h5>模块使用：</h5>
<pre><code>--直接代码调用记录日志操作
local tdwlog = require(&quot;kong.plugins.tdwutils.log.tdwlog&quot;)
--conf 见下面配置说明
tdwlog.init(conf)
--msg为日志数据
tdwlog.log(msg)
</code></pre>

<h5>配置说明：</h5>
<pre><code>local conf = {
 flush_limit = 8192，
 log_file = '',
 drop_limit = 1048576,
 periodic_flush = 20,
 kafka = {
   broker_list = {
     { host = '10.100.14.155', port = 9092 }
   },
   producer_config = {
     producer_type = 'async'
   },
   topic = 'kong_test' 
 },
 flush_func = function()
 end
}
</code></pre>

<ul>
<li>flush_limit:缓冲区大小（单位：字节）</li>
<li>drop_limit:丢弃缓冲阀值，如果超过该阀值，直接丢弃</li>
<li>log_file:刷出的文件</li>
<li>periodic_flush:定时刷出缓冲的时间间隔</li>
<li>
kafka:定义kafka信息
<ul>
<li>broker_list:kafka地址列表</li>
<li>producer_config.producer_type:async表示同步，sync异步</li>
<li>topic:定义topic</li>
</ul>
</li>
<li>flush_func:自定义缓冲区刷出函数(默认刷出到文件，同时指出刷出到kafka)</li>
</ul>

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